Diamond tool for dressing grinding wheels, etc.



Sept. 23, 1958 .1. LOECY, JR ,3 3,

DIAMOND TOOL FOR DRESSING GRINDING WHEELS, ETC

Filed April 27, 1956 IN VEN TOR. 7

ATI'ORNE Y6 United States Patent DIAMOND TOOL FOR DRESSING GRINDINGWHEELS, ETC.

Joe Loecy, In, Chardon, Ohio Application April 27, 1956, Serial No.581,063

6 Claims. (Cl. 12539) The present invention is for an improved diamondtool for use in dressing grinding wheels and the like and is of the samegeneral type as the device disclosed in my copending application SerialNo. 490,577, tiled February 25, 1955, which issued as Patent No.2,761,441, dated September 4, 1956.

As noted in the above co-pending application, it is common practice insuch a device to turn the diamond-carrying member from time to time soas to present a fresh surface portion of the diamond to the wheel andthus prevent uneven wear of the diamond and thereby prolon the usefullife of the diamond.

The present form of device, like that above referred to, is intended foruse in those situations where there is not suflicient space for suchautomatic mechanism as I have provided in other installations foreffecting such adjustment of the diamond. For instance, a diamond toolmight be of such small dimensions as three-sixteenths of an inch byone-half of an inch, although it is to be understood that the presentinvention is not limited to any particular dimensions. It is herecontemplated also to avoid the necessity of otherwise disrupting theposition of the diamond tool in order to effect such rotary adjustmentof the same.

Therefore my present invention contemplates the provision of acomparatively simple and inexpensive and yet effective means formounting the diamond tool in its shank, that will at the same timepermit ready and dependable manual rotary adjustment of the same withoutinvolving. any changes in the assembly and without re quiring theprovision of any other parts.

Another object is to provide such a device in the form of an improvedunit that may be conveniently assembled in its holder for operationthereby or removed therefrom with the same convenience.

Another object is to provide such a device that is particularly welladapted for use under conditions of restricted space that require such atool to be of comparatively small dimensions.

The method of making my present improved device constitutes anotherobject of this invention.

Other objects will appear from the following description and claims whenconsidered together with the accompanying drawing.

Fig. 1 is a view, partly in elevation and partly in section,illustrating my present improved structure;

Fig. 2 is an end elevation thereof.

It is to be understood that the present form of disclosure is merely forthe purpose of illustration and that there might be devised variousmodifications thereof without departing from the spirit of my inventionas herein set forth and claimed.

In my present form of device, as herein illustrated, the tool has theshank 1 that is adapted to be assembled in fixed position by means of aset screw S within a holder that is here indicated in a general way byreference letter.

H. The shank 1 is adapted to receive and to hold a diaice . 3 and 4,each of which is in the form of a frustum of a cone with their smallerends joining the cylindrical portion 2. Immediately forward of theportion 4 is, a cylindrical portion 5 while the forward end portion 6 ofthis tool member is of polygonal form, as for instance hexagonal,adapted for engagement by a standard wrench for turning the diamondtool. The diamond D may be mounted in the tool member in the usualmanner.

The shank 1 of suitable material may be appliedto the tool holder bycasting, swaging or spinning the same about the portions 2, 3, 4 and 5,and there will be selected a material for the shank 1 that will assumesufliciently tight frictional engagement about the diamond tool for thepurpose herein contemplated. The idea is to effect in this manner adependable frictional interengagement between the diamond't-ool and theshank 1 that will at the same time permit only rotatable adjustment ofthe tool within the shank 1 and in which such frictional engagement willbe suflicient to hold the tool in the position to which it may thus beturned. That is, there will be suitable frictional interengagementbetween these parts that will hold the tool in the position to whichadjusted and yet will permit such rotatable adjustment to be effected bymerely turning the tool with a wrench applied to the. hexagonal surface6 thereof. As a means of facilitating such turning of the tool withinthe shank 1 and in order to ensure against breaking of the metal at theinterengaging surfaces during such adjustment, the surface portions 2,3, 4 and 5 as well as the rear end of the diamond tool may be providedwith a coating of suitable lubricant 7, as for instance graphite.

It is to be understood that the particular form of the re-entrant neckportion 2, 3, 4 of the tool may be varied according to the particularmaterial employed and also according to whether such interengagement isto be effected by the casting, swaging or spinning process. In anyevent, the materials of the shank 1 and the diamond tool body will be ofsuch character that the shank 1 will tighten sufficiently about thediamond tool for such frictional engagement as to permit rotaryadjustment and dependable holding of the tool in such adjusted positionwithout any other means for this purpose. One such suitable material forthe shank 1 and for the diamond tool body is beryllium copper.

Thus, whenever it is desired to turn the diamond tool, this may beaccomplished by means of a standard wrench applied to the polygonalsurface 6 and without disturbing any other part or without requiring anyother adjustment or the provision of any other mechanism. The presentstructure and arrangement of the parts is such that there will bepermitted only rotary adjustment of the tool within its shank 1 and thetool will remain in the position to which adjusted until occasionrequires such further adjustment. Also, the adjustment of the tool willbe about the longitudinal axis of the same as the re-entrant portion ofthe tool is coaxial with respect thereto.

What I claim is:

1. The method of making a device for dressing grinding wheels or thelike, consisting in providing a diamond tool with an integral re-entrantsmooth surface co-axially thereabout, and applying a shank thereto byshaping a body of formable material about said diamond tool so as toeffect a rotatably releasable frictional engagement therebetween.

2. A device for dressing grinding wheels or the like, comprising a shankadapted to be fixedly mounted at its one end within a holder foroperation thereby and having an opening at its other end, the innersurface of said opening being provided with an annular inwardlyextending portion, a tool carrying a diamond, said diamondcarrying toolhaving an annularly co-axially grooved integral portion in rotatablyreleasable uniformly frictional engagement with the inner surface of theinwardly extending portion within the opening in said shank.

3. The same structure as recited inclaim 2 hereof and in which saidinwardly projecting portion and said grooved portion compriseinterengaging middle cylindrical portions and diverging forward andrearward adjoining portions each in the form of a frustum of a cone.

4. The same structure as recited in claim 2 hereof and in which saidtool has a co-axial cylindrical portion forward of said grooved portionand in engagement with said shank and in which said tool has a polygonalsurface portion forwardly beyond said shank so as to permit applicationof a wrench thereto.

5. The same structure as recited in claim 4 hereof and in which saidshank is in the form of an integral, onepiece body of material thatengages co-axially about said diamond-carrying tool in a seamless mannerand completely encloses the end of said tool that is opposite to thediamond.

6. The same structure as recited in claim 2 hereof and with the additionof a coating of lubricant between the frictionally interengagingsurfaces of said tool and shank.

Great Britain Oct. 15, 1943

